EQUITY (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	4 Months Ended	8 Months Ended	12 Months Ended
	Jun. 30, 2016	Sep. 30, 2016	Dec. 31, 2014	Dec. 31, 2016	Dec. 31, 2015	May 01, 2014
STOCKHOLDERS' EQUITY AND MEMBERS' CAPITAL
Minority ownership percentage					5.87%
Ownership percentage					56.27%
Dividend rate, percentage		7.00%
Redemption price (dollars per unit)		$ 25.00
Preferred Equity
STOCKHOLDERS' EQUITY AND MEMBERS' CAPITAL
Issuance of common units (in units)	12,400,000
Total offering price	$ 310.0
Ares Owners Holdings, L.P.
STOCKHOLDERS' EQUITY AND MEMBERS' CAPITAL
Number of units held						34,540,079
AOG
STOCKHOLDERS' EQUITY AND MEMBERS' CAPITAL
Daily Average Ownership Percentage			37.86%
AOG
STOCKHOLDERS' EQUITY AND MEMBERS' CAPITAL
Minority ownership percentage				38.26%	37.86%
Number of units held				80,814,732	80,679,600
Daily Average Ownership Percentage				38.04%
Units conversion ratio				100.00%
AOG | Ares Owners Holdings, L.P.
STOCKHOLDERS' EQUITY AND MEMBERS' CAPITAL
Minority ownership percentage				55.82%
Number of units held				117,928,313	119,905,131	118,421,766
Ownership percentage						59.21%
Daily Average Ownership Percentage			56.27%	56.07%
AOG | Alleghany
STOCKHOLDERS' EQUITY AND MEMBERS' CAPITAL
Minority ownership percentage				5.92%		6.25%
Number of units held				12,500,000	12,500,000	12,500,000
Daily Average Ownership Percentage			5.87%	5.89%